"if abortion were illegal, people will just get it done else where. Those that really do not want children will find some quack of a doctor to get it done or try to do it themselves. It's better if it is legal for medical reasons."
if pedophillia remains illegal people will still do it, those who want to abuse children will find some way of doing it, is it better for medical reasons that it is legalised?
Same to with rape, racisim, violence, drugs... So on and so forth.